rRNA and polytranscripts????

We have recently been looking at a sequence from a cDNA clone and have
discovered an 18srRNA gene plus a bit of unidentified sequence.
Question 1: I believe tRNAs (at least mitochondrial tRNAs) are sometimes
tacked on the end of a gene and the whole lot is produced as a
polytranscript and subsequently chopped up. Does this happen with rRNA
molecules or are they too large?
Question 2: Can an rRNA be reverse transcribed?
Thank you for any answers.
ALISTAIR FORREST